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Express your answers to problems

Chapter 1, Problem 18

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QUESTION:

Problem 18PE

Express your answers to problems in this section to the correct number of significant figures and proper units.

(a) How many significant figures are in the numbers 99 and 100? (b) If the uncertainty in each number is 1, what is the percent uncertainty in each? (c) Which is a more meaningful way to express the accuracy of these two numbers, significant figures or percent uncertainties?

Questions & Answers

QUESTION:

Problem 18PE

Express your answers to problems in this section to the correct number of significant figures and proper units.

(a) How many significant figures are in the numbers 99 and 100? (b) If the uncertainty in each number is 1, what is the percent uncertainty in each? (c) Which is a more meaningful way to express the accuracy of these two numbers, significant figures or percent uncertainties?

ANSWER:

Solution

Step 1

a) significant figures of a number are digits that carry meaning contributing to its measurement resolution.

In 99 there are two significant figures

In 100 there are one significant figure

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